Abstract :
In practical industrial applications of pneumatic systems, the issues of energy saving are receiving attention due to the considerable amount of compressed air wasted in operation. This research investigates a configuration of pneumatic systems while a special emphasis is put on the saving of energy in the execution. A method of recovering energy is also presented. In order to improve the performance and energy efficiency of the pneumatic drive, the by-pass valve control scheme is designed and studied. For pneumatic positioning application, in the constant speed phase, the inlet and outlet chambers will be connected via by-pass valve to reduce the overshoot and allow exhaust compressed air to be reused. Three supply pressures used5, 7 and 9 bars, compared with the traditional control of the motion of the asymmetric cylinder in which maximum energy saving obtained at 5, 7 and 9barare 16.7% 23.44% and 23.5% respectively.
